Friction coupling and brake.



K. MAYBAGH'. FRICTION COUPLING AND BRAKE.

APPLICATION FILED $1111.15, 1908.

Patented Dec. 15,1908.

KARL MAYBAOH, or PARIS, FRANCE.

FRICTION QOUPLING AND BRAKE.

Specification of Letters Patent.

Patented Dec. 15, 1908.

Application filed January 15, 1908. Serial No. 410,939.

To all whom it may concern:

Be it known that I, KARL MAYBAGH, a citizen of the German Empire,residing at Paris, France, have invented certain new and usefulImprovements in Friction Couplings and Brakes; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to a hollow cylindrical friction coupling andbrake which differs from other such couplings by its extraordinaryeffectiveness without requiring a corresponding expenditure of power.

The object of the invention consists in the arrangement of an openfriction ring in a hollow cylinder and connected with two push cranksfast on the driven shaft, in such a way, that, by means of the mechanismfor throwing into and out of engagement arranged on the one push crank,one brake ring end is pressed against the hollow cyl-' inder and inconsequence of the brake ring being carried with the hollow cylinderwhich results when it is pressed on the hollow cylinder, the other endof the brake ring is automatically pressed sharply against the hollowcylinder by means of a coupling piece connecting it with the second pushcrank. After the release of the coupling the friction ring contracts insuch a way that it stands away from the hollow cylinder uniformly allround. By a suitable arrangement of the coupling in accordance with thisinvention it may also be employed as a brake, whereby the advantages ofits great brake power with a minimum expenditure of power comeparticularly into play.

Band brakes or couplings are already known in which the ends of the bandare pressed apart, however all these have the drawback that all theconnecting pressure on the driven shaft is transmitted by rigid connections, while this is operated by a jointed connection in the presentinvention by means of which the end of the band is sharply pressed onthe friction body. The power obtained is also so great that the arrangement of the brake band in several loops as hitherto, may be dispensedwith, a single loop suflicing therefor.

The object of this invention is shown in the accompanying drawings as anexample.

Figure l is a view of the friction coupling in the coupled position.Fig. 2, in the released position, and Fig. 3 is an axial section of anexample of construction of a member employed for coupling.

A push crank b is arranged on the axle a which is to be driven, on whichcrank a double-armed lever (Z pivotal on a pin 0 and serving forthrowing the coupling into and out of action is mounted, which lever maybe caused to turn by hand by suitable means, for instance, a conicallytapering axially displaceable slide piece 6. The lever cl is connectedby a rod f with one end it of the open brake ring g, which is intendedto bear against a hollow cylinder m revolving in the direction indicatedby the arrow. The other end '2 of the brake ring g is connected by alink piece 7a with a second push crank Z fixed on the axle a. On thecoupling being engaged, that is to say on the slide piece beingdisplaced, the end h of the brake ring 9 is first pressed in theordinary manner on the hollow cylinder m,- the brake ring g is therebyturned with it and its end 2' in consequence of. the action of thecoupling piece is pressed tightly on the hollow cylinder on. Anadvantageous application of power is thereby exerted, Without theoperation of the slide piece 6 necessitating an appreciable expenditureof power. The ends it and z' of the brake ring are so arranged that theymay be displaced one in another with the object that when the brake ringis released, the released end it acts immediately on the other end 2' ofthe brake ring, and the brake ring is immediately and uniformly drawnoff the hollow cylinder. In the uncoupled position the brake ring standsaway uniformly all round from the hollow cylinder g.

In practice the arrangement as a coupling is preferably made symmetricaland two semicircular bands are employed.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is The combination of a rotary member, a cylindrical rotarymember surrounding the first-named rotary member, a conical controllingpart rotative with but movable longitudinally of said first-namedmember, a split ring inclosed within the cylindrical member, a leverpivoted on said first-named member on an axis parallel With the axis ofi In testimony whereof I aflix my signature,- sald first-named member,and crosslng links, in presence of two Witnesses. one of said linksconnecting one end of the lever With one end portion of the split ring AA and the other link connecting said first- Witnesses:

named member with the other end portion HANSON C. COKE,

- of said ring, substantially as described. MAURICE RoUX.

